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[Besbeset]

It's not necessarily that it's unfair, but it's less incentive to click the "in progress" box. I think what others are trying to say is people aren't going to want to run for less tomes, so they'll be less likely to click the box and join an in progress.

But I think that it would be completely fair to base the reward on the time spent, isn't it?

I agree with adding an extra reward for helping others, but I don't like when that system is being exploited.
So they either need to change the way the rewards are granted, or implement some kind of penalty for those that intentionally "fish" for dungeons.